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ÆßÐÇÆ°³ækkk
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2Â¥2017-12-12 15:15:10
hongyingwu
ÖÁ×ðľ³æ (ÎÄ̳¾«Ó¢)
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ÐÇ»ðabcd: ½ð±Ò+10, ¡ï¡ï¡ïºÜÓаïÖú, thanks 2017-12-12 15:46:23
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ÐÇ»ðabcd: ½ð±Ò+10, ¡ï¡ï¡ïºÜÓаïÖú, thanks 2017-12-12 15:46:23
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Tungsten Alloys: Tungsten metal can be combined with other metals to increase their strength and resistance to wear and corrosion. Steel alloys often contain tungsten for these beneficial properties. Many high-speed steels -- those used in cutting and machining tools like saw blades -- contain around 18 percent tungsten. Tungsten-steel alloys are also used in the production of rocket engine nozzles, which must have high heat resistant properties. Other tungsten alloys include Stellite (cobalt, chromium, and tungsten), which is used in bearing and pistons due to its durability and resistance to wear, and Hevimet, which is made by sintering a tungsten alloy powder and is used in ammunition, dart barrels, and golf clubs. Superalloys made of cobalt, iron or nickel, along with tungsten, can be used to produce turbine blades for aircraft. |
3Â¥2017-12-12 15:32:31
ÐÇ»ðabcd
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4Â¥2017-12-12 15:45:09
ÐÇ»ðabcd
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5Â¥2017-12-12 15:46:01
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6Â¥2017-12-13 15:47:42
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7Â¥2017-12-14 18:10:55













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